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Customers of the Sky Mountain Grocery chain are routinely asked at the checkout whether they prefer paper or plastic bags for their purchases. In a recent study, researchers observed the type of bag specified and surveyed the customer for other information, including his or her level of education. For the 175 persons in the sample, bag selection and education levels were as shown below.
At the 0.01 level, is bag selection independent of education level? Based on the chi-square table, what is the most accurate statement that can be made about the p-value for the test?
use linear regression to forecast values for periods 11 to 13 for the following time
given pa0.25 pb0.50 pab0.12 pabc 0.13 pacb0.38 pacbc0.37. express the following events in set notation and find their
The level of significance selected is 0.01 and 26 accounts are sampled. What is the critical value? Based on a sample size of 25?
Suppose that a Santa Clara County kindergartner is selected at random. Are the events selected student is a recent immigrant and selected student has TB independent or dependent events? Justify your answer using the given information.
If only one spark plug fails, the plane will shake and not climb higher, but it can be landed safely. What is the probability that this happens? Calculate using the appropriate formula.
Formulate West's production-mix decision as a linear programming problem, and solve. NOTE: This problem must be solved using one of the following methods. How many tables and bookcases should be produced each week?
A researcher wishes to forcast the proportion of fish in a perticular lake which is inedible due to pollution of the lake.
ACT scores of high school seniors. The scores of high school seniors on the ACT college entrance examination in 2003 had mean JL = 20.80 and standard deviation (J = 4.80. The distribution of scores is only roughly Normal.
Olympic Track related question: You know the last 5 race times at the same distance for 8 runners competing in a race. As such, you can calculate the mean, sd, and variance for each.
How do we go about interpreting the results of various types of statistical tests in health care research?
Suppose an unrelated 77-year old man, 76 - year old woman, and 82- year old woman are selected from a community. What is the probability that all three of these individuals have Alzheimer's disease?
you are conducting a study to see if students do better when they study all at once or in intervals. one group of 12
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